Chery S11 / Chery QQ. Manual — part 36

Chery QQ Service Manual Chassis System

Keep enough brake distance. When driving on good road, keep at least 3 s of

braking from front vehicle. When driving on bad road, keep more time for
braking.

Practice ABS braking before driving. Get ready for pedal’s vibration when

ABS is working. Parking place and square are the best place for practicing.

Read owner’s manual carefully to better understand each instruction offered

by manufacture.

Don’t drive vehicle with ABS at random. It’s dangerous to turn sharp or steer

hard.

Don’t step down brake pedal repeatedly. When driving vehicle with ABS, it

will cause ABS on and off frequently, which will decrease the ability of braking
and increase braking distance. In fact, ABS will control brake ability
automatically.

Don’t forget to turn steering wheel. ABS supply steering control ability for

driver, but itself cannot steer automatically.

Don’t be afraid of the noise of hydraulic system’s working and pedal

vibration. The noise is normal and means ABS is working.

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Chery QQ Service Manual Chassis System

Chapter two Tests and Adjustments of

Four-Wheel Positioning

Section One: Basic Tests and Checks

Preparations prior to adjustments

I. Checks prior to adjustments
（1）Checks on tire air pressure
（2）Checks on car body
1、Check the tire air pressure,
and adjust to the specified pressure.

Standard air pressure for tires (kPa)

Item

Front wheel

Rear wheel

Spare tire

Zero load

220

220

250

2、Check the spacing of front wheel bearings, and replace the front wheel bearings when
necessary;
3、Check the status of the wheel outer rims, as well as the status of the wheel sections and
tires;
4、Check to see if the ball joint of the horizontal draw-bar for turning is too loose;
5、Place the car on a leveled ground without any luggage or passenger;
6、Make sure that the left and right heights from the wheel center line to the dasher do not
exceed the standard heights;
7、Check to see if the absorber performance is normal.


II. Rim section and tire
1、Visual checks
Check the tires and rim sections, and make proper
replacements if any cracks, damages, deformations
or other defects are detected on the rim sections or
tires.

Tears and wears of tire

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Chery QQ Service Manual Chassis System

2、Tire tears and wears
（1）Check the depth of the remaining tire
textures.
The depth of the remaining tire textures (as shown
in the Figure)
Standard tires: 1.6mm min.
Snow ground tires: 50 % tire textures
（2）In the case that the wear-and-tear indication
belt is exposed, the tire must be replaced.

Indication points for tire tears and wears

3、Abnormal tears and wears of tires

The abnormal tears and wears of the tires as

shown in the right figure might occur. Refer to the
following table for the possible causes and the
approaches for handling the trouble.

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Toe-in and toe-out wear

Unilateral-wear

Tears and wears of tire

Possible causes

Approaches for handling

（a）

* Insufficient tire air pressure
(tears and wears on both sides)
* Turning in fast speed
* Tire positions not re-adjusted

* Test and adjust tire air pressure

* Slow down car speed
* Re-adjust tire positions

（b）

* Excessively high tire air pressure
* Tire positions not re-adjusted

* Test and adjust tire air pressure
* Re-adjust tire positions

（c）

* Toe-in incorrect

* Adjust the toe-in

（d）

* Camber angle incorrect

* Suspension system defective

* Tires not balanced

* Brake drum or disk not circular
* Other mechanic troubles
* Tire positions not re-adjusted

* Adjust, repair or replace the parts

of the axle and suspension system

* Repair or replace the suspension
system
* Make dynamic balance of tires or
replace the tire
* Make alignment or replacements
* Make alignment or replacements
* Readjust the tire positions

Center wear

bi-wear

Wear position

Wear position

Chery QQ Service Manual Chassis System

4、Points of attention for the rim sections and tires
（1）Do not use the under-standard rim sections or tires;
（2）The aluminum alloy rims are easy to be damaged by scraps. Please use soft cloth
when doing the cleaning. Never try to use steel brushes. If steam is used for cleaning the
car, do not allow the boiling water to contact the rim sections;
（3）In the case that some alkali chemical compounds (such as mud water, road surface
mud, etc.) stain on the aluminum alloy rim sections, use the neutralizing agents to clean
them off as soon as possible so as to avoid the rim sections from being damaged.

5、Tire replacements
（1）Before installing the air valve nozzle, first check to see if the air valve opening on the
tire is smooth and free of rags. Then apply some glycerin onto the surface of the air valve
nozzle rubber or dip the air valve nozzle in the glycerin. Use the special tools to exert the
air pressure of 200—400N so as to allow the positioning ring of the air valve nozzle to pass
the hole on the wheel which complete the installation and positioning (soap solution can be
used to substitute glycerin);
（2）Before installing the tires, apply glycerin or soap solution along the tire rings. Make
sure that when there are light indication spot marks on the rims, the test marks for tire
balance should be aligned with these light indication spot marks. When there are not light
indication spot marks on the rim, the dynamic balance test marks of the tire should be
aligned with the air valve nozzle position. If there are neither light indication spot marks
on the rim nor dynamic balance test marks on the tire, but there are static balance test
marks on the tire, make sure that the air valve nozzle is aligned with the static balance test
marks.

6、Tire pressure
Check the air pressures of all the tires (including the
spare tire) with the barometer. Make proper adjustments
if the air pressure does not meet the specifications. Strictly
follow the specified air pressure in filling the tires with air.
During the air filling, the air pressure should not exceed the
nominal air pressure by 10 %. The tire with filled air should
be placed separate from the wheel mounted on the car. Before
doing the positioning of the four wheels, please check the air

tyre

pressures of the four wheels and make proper adjustments

air hole

so as to meet the specified air pressure.



7、Air leakage
Make sure there is no air leakage at the air valve.
Checks of air valve nozzles

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